In Louisiana, the wife of a former soldier is scaling back on Facebook posts and considering unfriending old acquaintances, worried an innocuous joke or long-lost associate might one day land her in a government probe. In California, a college student encrypts chats and emails, saying he’s not planning anything sinister but shouldn’t have to sweat snoopers. And in Canada, a lawyer is rethinking the data products he uses to ensure his clients’ privacy.

In the suburbs edged by woods midway between Baltimore and the nation’s capital, residents long joked that the government spy shop next door was so ultra-secretive its initials stood for “No Such Agency.” But when Edward Snowden grew up here, the National Security Agency’s looming presence was both a very visible and accepted part of everyday life.